I have a Hi Bebe LCD Display BT200 which i brought brand new for £90.
This is the write up for it:
This handy portable fetal doppler detects the fetal heart rate quickly from about 10-12 weeks through labour, and it's safe and simple to use. The new Hi Bebe BT200 hand held fetal heart rate monitor has been designed to be small and lightweight, yet robust, making it ideal for midwives, doctors and of course, pregnant women.
The Hi Bebe fetal doppler features an audio speaker, plus a clear LCD display of the fetal heart rate. Not only will the sound of your baby reassure you, but you can bond with your baby from the very beginning. With the built in loudspeaker, you can share the miracle with family and friends. Or use the audio output for earphones to lull yourself to sleep with the sound of your baby's heart beating.
The Hi Bebe BT-200 baby fetal monitors come complete with attached probe, batteries and ultrasound transmission gel (everything you need to start monitoring.).